HS Classification between Flax Fibre and Made-Up Linen Goods
Classification between Chapter 53 flax and Chapter 63 made-up linen depends strictly on Section XI Note 7 edge finishing, sewing, and structural shape criteria.
Edge Hemming
Mechanical Fold
Folding the raw perimeter of a woven textile inward creates a stable boundary to prevent fraying and secure the fabric edge for garment construction. Edge hemming occurs during the finishing phase of linen production, often within the cut and sew department where technicians manipulate fabric widths before assembly. This operation transforms loose fibres into a locked structure, providing the physical strength required for high tension seams in final apparel.
Quality control inspectors verify the fold width and stitch integrity against the internal mill specification rather than the looser buyer acceptance criteria. If a fold deviates from the measured tolerance, the fabric fails to pass the secondary inspection station.
Production Adjustment
Precise alignment of the linen grain remains the primary constraint during this stage of manufacturing. Workers feed the fabric through automated folders that guide the material under high speed sewing heads. Tension sensors detect variations in thickness caused by uneven flax density, triggering immediate adjustments to the presser foot pressure.
Machines that lack these sensors often produce puckered lines or skipped stitches, rendering the entire roll unfit for export. Technicians regularly calibrate the guide rails to compensate for the natural stretch inherent in untreated linen, ensuring the final dimension matches the intended garment pattern. Accurate settings here prevent downstream distortion when the finished pieces encounter industrial laundry cycles.
Stitch Verification
Independent auditors examine the folded zones to confirm the thread density and overlap length meet the required mill standard for durability. Each sample undergoes a pull test to verify the strength of the bond between the folded layer and the main body of the textile. Heavy linen requires a longer stitch length to avoid shearing the fibre, whereas lighter flax weaves demand tighter loops to hold the fold flat.
The inspection report records the number of stitches per centimetre and the consistency of the fold line across the entire piece. Failures in this inspection indicate an error in the initial machine setup or a lack of synchronisation between the feeding mechanism and the needle speed. Consistent thread tension constitutes the most reliable method for ensuring the longevity of a textile seam.